Open UISplitViewController to Master View rather than Detail

Question

I have a split-view interface with a target iPhone 6 application. On the first launch of the application, it opens to the Detail View; I would like it to open to the Master

Answer 1

Or just inherit from UISplitViewController and use this new class in the storyboard (based on SwiftArchitect's answer):

class MasterShowingSplitViewController :UISplitViewController, UISplitViewControllerDelegate {
    override func viewDidLoad() {
        super.viewDidLoad()

        self.delegate = self
        self.preferredDisplayMode = .allVisible
    }

    func splitViewController(
        _ splitViewController: UISplitViewController,
        collapseSecondary secondaryViewController: UIViewController,
        onto primaryViewController: UIViewController) -> Bool {
        // Return true to prevent UIKit from applying its default behavior
        return true
    }
}